Hoffman Amplifiers Tube Amplifier Forum

Other Stuff => Solid State => Topic started by: scole on November 27, 2009, 03:22:36 pm

Title: stout relay circuit
Post by: scole on November 27, 2009, 03:22:36 pm

what does the relay circuit do? can it be left out?

Title: Re: stout relay circuit
Post by: topbrent on November 27, 2009, 04:38:25 pm

The relay switches the extra gain stage in and out.

Here is the hardwired, gainstage always on version:

http://www.el34world.com/projects/images/Stout.gif
(http://www.el34world.com/projects/images/Stout.gif)

Here is the switchable gainstage version:

http://www.el34world.com/projects/images/18WATT_VOLTAGES.gif
(http://www.el34world.com/projects/images/18WATT_VOLTAGES.gif)

Title: Re: stout relay circuit
Post by: topbrent on November 28, 2009, 04:26:07 am

Here are the schematics to compare if you prefer.
There wasn't a schematic for the no-switch version, so I edited out the relay circuitry.

Title: Re: stout relay circuit
Post by: scole on November 28, 2009, 12:48:43 pm

can you make a master vol version of the stout?

Title: Re: stout relay circuit
Post by: scole on November 28, 2009, 11:20:04 pm

why do we need the relay? cant we just put a direct switch? is it for safety? to keep high voltage away from the control panel?

Title: Re: stout relay circuit
Post by: kagliostro on November 29, 2009, 02:09:54 am

more short are the wires less is the way to get noise

that can be a good reason

Kagliostro

Title: Re: stout relay circuit
Post by: sluckey on November 29, 2009, 07:27:10 am

The relay makes it very easy to switch remotely via a footswitch.

Title: Re: stout relay circuit
Post by: scole on November 29, 2009, 11:45:38 am

ok so you dont really need the relay, you can just put a regular switch in?

Title: Re: stout relay circuit
Post by: sluckey on November 29, 2009, 12:36:02 pm

yes

Title: Re: stout relay circuit
Post by: scole on November 29, 2009, 06:54:41 pm

does the stout with no switch have any clean or is it all gain?